Phytec phyCORE-i.MX27, Hardware Manual

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phyCOREi.MX27
28
©
PHYTEC Messtechnik GmbH 2011 L-710e_5
Table 3: Power supply for the minimum circuit
power supply min. typ. max.
5 V (x_Charger_Input) 4.4 V 5 V 20 V
3.3 V (VIN) 3.25 V 3.3 V 4.5 V
3.3 V (VCC_3V3) 3.15 V 3.3 V 3.45 V
The input voltage range of VIN is from 3.1 V.. 4.65 V, with a nominal current allowance of at least 3 A.
VCC_3V3 should be in a range of 3.3 V ±
0.15 V (±0.05 V if VCC_3V3 is connected to VIN) with a
nominal current allowance of at least 1.5 A.
See
Table 1 from section 2 above for applicable VIN / VCC_3V3 power pins on the
phyCORE-connector.
Caution!
Connect all VIN and VCC_3V3 input pins to your power supplies.
As a general design rule we recommend connecting all GND pins which are neighboring signals being
used in the application circuitry.
The i.MX27 CPU is supplied by a lot of different power domains. Some of them are connected
together. The startup voltage levels are selected by the Power up Mode selection inputs (PUMS1..3)
of the PMIC device MC13783. With the default settings of the input pins PUMS1..3 the voltages are
the following:
Table 4: i.MX27 default power input voltages
MC13783 P
OWER
O
UTPUT
P
OWER
-D
OMAIN
S
TARTUP
V
OLTAGE
-L
EVEL
SW1 QVDD 1.2 V
SW2 NVDD1_2_3_4_5 1.8 V
SW3 SW3 5 V
VAUDIO internally used by MC13783 2.775 V
VIOLO AVDD 1.8 V
VIOHI OSC26VDD 2.775 V
VGEN PLL_VDD 1.5 V
VCAM NVDD11 2.8 V
VRF1 NVDD7_12_14 2.775 V
VRF2 NVDD6_8_9_10 2.775 V
VMMC1 NVDD15 2.775 V
In general you should not need to adjust the Power up Mode settings. The configuration has been
optimized for the phyCORE-i.MX27 together with the phyCORE-i.MX Carrier Board.